Vignesh Venkatasubramanian | 5a9753f | 2016-01-19 11:05:09 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2013 The WebM project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include <assert.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | #include "./vpx_config.h" |
| 15 | #include "./vpx_dsp_rtcd.h" |
| 16 | #include "vpx/vpx_integer.h" |
| 17 | #include "vpx_dsp/vpx_convolve.h" |
| 18 | #include "vpx_dsp/vpx_dsp_common.h" |
| 19 | #include "vpx_dsp/vpx_filter.h" |
| 20 | #include "vpx_ports/mem.h" |
| 21 | |
| 22 | static void convolve_horiz(const uint8_t *src, ptrdiff_t src_stride, |
| 23 | uint8_t *dst, ptrdiff_t dst_stride, |
| 24 | const InterpKernel *x_filters, |
| 25 | int x0_q4, int x_step_q4, int w, int h) { |
| 26 | int x, y; |
| 27 | src -= SUBPEL_TAPS / 2 - 1; |
| 28 | for (y = 0; y < h; ++y) { |
| 29 | int x_q4 = x0_q4; |
| 30 | for (x = 0; x < w; ++x) { |
| 31 | const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; |
| 32 | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; |
| 33 | int k, sum = 0; |
| 34 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 35 | sum += src_x[k] * x_filter[k]; |
| 36 | dst[x] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); |
| 37 | x_q4 += x_step_q4; |
| 38 | } |
| 39 | src += src_stride; |
| 40 | dst += dst_stride; |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | static void convolve_avg_horiz(const uint8_t *src, ptrdiff_t src_stride, |
| 45 | uint8_t *dst, ptrdiff_t dst_stride, |
| 46 | const InterpKernel *x_filters, |
| 47 | int x0_q4, int x_step_q4, int w, int h) { |
| 48 | int x, y; |
| 49 | src -= SUBPEL_TAPS / 2 - 1; |
| 50 | for (y = 0; y < h; ++y) { |
| 51 | int x_q4 = x0_q4; |
| 52 | for (x = 0; x < w; ++x) { |
| 53 | const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; |
| 54 | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; |
| 55 | int k, sum = 0; |
| 56 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 57 | sum += src_x[k] * x_filter[k]; |
| 58 | dst[x] = ROUND_POWER_OF_TWO(dst[x] + |
| 59 | clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1); |
| 60 | x_q4 += x_step_q4; |
| 61 | } |
| 62 | src += src_stride; |
| 63 | dst += dst_stride; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | static void convolve_vert(const uint8_t *src, ptrdiff_t src_stride, |
| 68 | uint8_t *dst, ptrdiff_t dst_stride, |
| 69 | const InterpKernel *y_filters, |
| 70 | int y0_q4, int y_step_q4, int w, int h) { |
| 71 | int x, y; |
| 72 | src -= src_stride * (SUBPEL_TAPS / 2 - 1); |
| 73 | |
| 74 | for (x = 0; x < w; ++x) { |
| 75 | int y_q4 = y0_q4; |
| 76 | for (y = 0; y < h; ++y) { |
| 77 | const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; |
| 78 | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; |
| 79 | int k, sum = 0; |
| 80 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 81 | sum += src_y[k * src_stride] * y_filter[k]; |
| 82 | dst[y * dst_stride] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); |
| 83 | y_q4 += y_step_q4; |
| 84 | } |
| 85 | ++src; |
| 86 | ++dst; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | static void convolve_avg_vert(const uint8_t *src, ptrdiff_t src_stride, |
| 91 | uint8_t *dst, ptrdiff_t dst_stride, |
| 92 | const InterpKernel *y_filters, |
| 93 | int y0_q4, int y_step_q4, int w, int h) { |
| 94 | int x, y; |
| 95 | src -= src_stride * (SUBPEL_TAPS / 2 - 1); |
| 96 | |
| 97 | for (x = 0; x < w; ++x) { |
| 98 | int y_q4 = y0_q4; |
| 99 | for (y = 0; y < h; ++y) { |
| 100 | const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; |
| 101 | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; |
| 102 | int k, sum = 0; |
| 103 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 104 | sum += src_y[k * src_stride] * y_filter[k]; |
| 105 | dst[y * dst_stride] = ROUND_POWER_OF_TWO(dst[y * dst_stride] + |
| 106 | clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1); |
| 107 | y_q4 += y_step_q4; |
| 108 | } |
| 109 | ++src; |
| 110 | ++dst; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | static void convolve(const uint8_t *src, ptrdiff_t src_stride, |
| 115 | uint8_t *dst, ptrdiff_t dst_stride, |
| 116 | const InterpKernel *const x_filters, |
| 117 | int x0_q4, int x_step_q4, |
| 118 | const InterpKernel *const y_filters, |
| 119 | int y0_q4, int y_step_q4, |
| 120 | int w, int h) { |
| 121 | // Note: Fixed size intermediate buffer, temp, places limits on parameters. |
| 122 | // 2d filtering proceeds in 2 steps: |
| 123 | // (1) Interpolate horizontally into an intermediate buffer, temp. |
| 124 | // (2) Interpolate temp vertically to derive the sub-pixel result. |
| 125 | // Deriving the maximum number of rows in the temp buffer (135): |
| 126 | // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). |
| 127 | // --Largest block size is 64x64 pixels. |
| 128 | // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the |
| 129 | // original frame (in 1/16th pixel units). |
| 130 | // --Must round-up because block may be located at sub-pixel position. |
| 131 | // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. |
| 132 | // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. |
| 133 | uint8_t temp[135 * 64]; |
| 134 | int intermediate_height = |
| 135 | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; |
| 136 | |
| 137 | assert(w <= 64); |
| 138 | assert(h <= 64); |
| 139 | assert(y_step_q4 <= 32); |
| 140 | assert(x_step_q4 <= 32); |
| 141 | |
| 142 | convolve_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, temp, 64, |
| 143 | x_filters, x0_q4, x_step_q4, w, intermediate_height); |
| 144 | convolve_vert(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst, dst_stride, |
| 145 | y_filters, y0_q4, y_step_q4, w, h); |
| 146 | } |
| 147 | |
| 148 | static const InterpKernel *get_filter_base(const int16_t *filter) { |
| 149 | // NOTE: This assumes that the filter table is 256-byte aligned. |
| 150 | // TODO(agrange) Modify to make independent of table alignment. |
| 151 | return (const InterpKernel *)(((intptr_t)filter) & ~((intptr_t)0xFF)); |
| 152 | } |
| 153 | |
| 154 | static int get_filter_offset(const int16_t *f, const InterpKernel *base) { |
| 155 | return (int)((const InterpKernel *)(intptr_t)f - base); |
| 156 | } |
| 157 | |
| 158 | void vpx_convolve8_horiz_c(const uint8_t *src, ptrdiff_t src_stride, |
| 159 | uint8_t *dst, ptrdiff_t dst_stride, |
| 160 | const int16_t *filter_x, int x_step_q4, |
| 161 | const int16_t *filter_y, int y_step_q4, |
| 162 | int w, int h) { |
| 163 | const InterpKernel *const filters_x = get_filter_base(filter_x); |
| 164 | const int x0_q4 = get_filter_offset(filter_x, filters_x); |
| 165 | |
| 166 | (void)filter_y; |
| 167 | (void)y_step_q4; |
| 168 | |
| 169 | convolve_horiz(src, src_stride, dst, dst_stride, filters_x, |
| 170 | x0_q4, x_step_q4, w, h); |
| 171 | } |
| 172 | |
| 173 | void vpx_convolve8_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, |
| 174 | uint8_t *dst, ptrdiff_t dst_stride, |
| 175 | const int16_t *filter_x, int x_step_q4, |
| 176 | const int16_t *filter_y, int y_step_q4, |
| 177 | int w, int h) { |
| 178 | const InterpKernel *const filters_x = get_filter_base(filter_x); |
| 179 | const int x0_q4 = get_filter_offset(filter_x, filters_x); |
| 180 | |
| 181 | (void)filter_y; |
| 182 | (void)y_step_q4; |
| 183 | |
| 184 | convolve_avg_horiz(src, src_stride, dst, dst_stride, filters_x, |
| 185 | x0_q4, x_step_q4, w, h); |
| 186 | } |
| 187 | |
| 188 | void vpx_convolve8_vert_c(const uint8_t *src, ptrdiff_t src_stride, |
| 189 | uint8_t *dst, ptrdiff_t dst_stride, |
| 190 | const int16_t *filter_x, int x_step_q4, |
| 191 | const int16_t *filter_y, int y_step_q4, |
| 192 | int w, int h) { |
| 193 | const InterpKernel *const filters_y = get_filter_base(filter_y); |
| 194 | const int y0_q4 = get_filter_offset(filter_y, filters_y); |
| 195 | |
| 196 | (void)filter_x; |
| 197 | (void)x_step_q4; |
| 198 | |
| 199 | convolve_vert(src, src_stride, dst, dst_stride, filters_y, |
| 200 | y0_q4, y_step_q4, w, h); |
| 201 | } |
| 202 | |
| 203 | void vpx_convolve8_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, |
| 204 | uint8_t *dst, ptrdiff_t dst_stride, |
| 205 | const int16_t *filter_x, int x_step_q4, |
| 206 | const int16_t *filter_y, int y_step_q4, |
| 207 | int w, int h) { |
| 208 | const InterpKernel *const filters_y = get_filter_base(filter_y); |
| 209 | const int y0_q4 = get_filter_offset(filter_y, filters_y); |
| 210 | |
| 211 | (void)filter_x; |
| 212 | (void)x_step_q4; |
| 213 | |
| 214 | convolve_avg_vert(src, src_stride, dst, dst_stride, filters_y, |
| 215 | y0_q4, y_step_q4, w, h); |
| 216 | } |
| 217 | |
| 218 | void vpx_convolve8_c(const uint8_t *src, ptrdiff_t src_stride, |
| 219 | uint8_t *dst, ptrdiff_t dst_stride, |
| 220 | const int16_t *filter_x, int x_step_q4, |
| 221 | const int16_t *filter_y, int y_step_q4, |
| 222 | int w, int h) { |
| 223 | const InterpKernel *const filters_x = get_filter_base(filter_x); |
| 224 | const int x0_q4 = get_filter_offset(filter_x, filters_x); |
| 225 | |
| 226 | const InterpKernel *const filters_y = get_filter_base(filter_y); |
| 227 | const int y0_q4 = get_filter_offset(filter_y, filters_y); |
| 228 | |
| 229 | convolve(src, src_stride, dst, dst_stride, |
| 230 | filters_x, x0_q4, x_step_q4, |
| 231 | filters_y, y0_q4, y_step_q4, w, h); |
| 232 | } |
| 233 | |
| 234 | void vpx_convolve8_avg_c(const uint8_t *src, ptrdiff_t src_stride, |
| 235 | uint8_t *dst, ptrdiff_t dst_stride, |
| 236 | const int16_t *filter_x, int x_step_q4, |
| 237 | const int16_t *filter_y, int y_step_q4, |
| 238 | int w, int h) { |
| 239 | /* Fixed size intermediate buffer places limits on parameters. */ |
| 240 | DECLARE_ALIGNED(16, uint8_t, temp[64 * 64]); |
| 241 | assert(w <= 64); |
| 242 | assert(h <= 64); |
| 243 | |
| 244 | vpx_convolve8_c(src, src_stride, temp, 64, |
| 245 | filter_x, x_step_q4, filter_y, y_step_q4, w, h); |
| 246 | vpx_convolve_avg_c(temp, 64, dst, dst_stride, NULL, 0, NULL, 0, w, h); |
| 247 | } |
| 248 | |
| 249 | void vpx_convolve_copy_c(const uint8_t *src, ptrdiff_t src_stride, |
| 250 | uint8_t *dst, ptrdiff_t dst_stride, |
| 251 | const int16_t *filter_x, int filter_x_stride, |
| 252 | const int16_t *filter_y, int filter_y_stride, |
| 253 | int w, int h) { |
| 254 | int r; |
| 255 | |
| 256 | (void)filter_x; (void)filter_x_stride; |
| 257 | (void)filter_y; (void)filter_y_stride; |
| 258 | |
| 259 | for (r = h; r > 0; --r) { |
| 260 | memcpy(dst, src, w); |
| 261 | src += src_stride; |
| 262 | dst += dst_stride; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | void vpx_convolve_avg_c(const uint8_t *src, ptrdiff_t src_stride, |
| 267 | uint8_t *dst, ptrdiff_t dst_stride, |
| 268 | const int16_t *filter_x, int filter_x_stride, |
| 269 | const int16_t *filter_y, int filter_y_stride, |
| 270 | int w, int h) { |
| 271 | int x, y; |
| 272 | |
| 273 | (void)filter_x; (void)filter_x_stride; |
| 274 | (void)filter_y; (void)filter_y_stride; |
| 275 | |
| 276 | for (y = 0; y < h; ++y) { |
| 277 | for (x = 0; x < w; ++x) |
| 278 | dst[x] = ROUND_POWER_OF_TWO(dst[x] + src[x], 1); |
| 279 | |
| 280 | src += src_stride; |
| 281 | dst += dst_stride; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | void vpx_scaled_horiz_c(const uint8_t *src, ptrdiff_t src_stride, |
| 286 | uint8_t *dst, ptrdiff_t dst_stride, |
| 287 | const int16_t *filter_x, int x_step_q4, |
| 288 | const int16_t *filter_y, int y_step_q4, |
| 289 | int w, int h) { |
| 290 | vpx_convolve8_horiz_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, |
| 291 | filter_y, y_step_q4, w, h); |
| 292 | } |
| 293 | |
| 294 | void vpx_scaled_vert_c(const uint8_t *src, ptrdiff_t src_stride, |
| 295 | uint8_t *dst, ptrdiff_t dst_stride, |
| 296 | const int16_t *filter_x, int x_step_q4, |
| 297 | const int16_t *filter_y, int y_step_q4, |
| 298 | int w, int h) { |
| 299 | vpx_convolve8_vert_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, |
| 300 | filter_y, y_step_q4, w, h); |
| 301 | } |
| 302 | |
| 303 | void vpx_scaled_2d_c(const uint8_t *src, ptrdiff_t src_stride, |
| 304 | uint8_t *dst, ptrdiff_t dst_stride, |
| 305 | const int16_t *filter_x, int x_step_q4, |
| 306 | const int16_t *filter_y, int y_step_q4, |
| 307 | int w, int h) { |
| 308 | vpx_convolve8_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, |
| 309 | filter_y, y_step_q4, w, h); |
| 310 | } |
| 311 | |
| 312 | void vpx_scaled_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, |
| 313 | uint8_t *dst, ptrdiff_t dst_stride, |
| 314 | const int16_t *filter_x, int x_step_q4, |
| 315 | const int16_t *filter_y, int y_step_q4, |
| 316 | int w, int h) { |
| 317 | vpx_convolve8_avg_horiz_c(src, src_stride, dst, dst_stride, filter_x, |
| 318 | x_step_q4, filter_y, y_step_q4, w, h); |
| 319 | } |
| 320 | |
| 321 | void vpx_scaled_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, |
| 322 | uint8_t *dst, ptrdiff_t dst_stride, |
| 323 | const int16_t *filter_x, int x_step_q4, |
| 324 | const int16_t *filter_y, int y_step_q4, |
| 325 | int w, int h) { |
| 326 | vpx_convolve8_avg_vert_c(src, src_stride, dst, dst_stride, filter_x, |
| 327 | x_step_q4, filter_y, y_step_q4, w, h); |
| 328 | } |
| 329 | |
| 330 | void vpx_scaled_avg_2d_c(const uint8_t *src, ptrdiff_t src_stride, |
| 331 | uint8_t *dst, ptrdiff_t dst_stride, |
| 332 | const int16_t *filter_x, int x_step_q4, |
| 333 | const int16_t *filter_y, int y_step_q4, |
| 334 | int w, int h) { |
| 335 | vpx_convolve8_avg_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, |
| 336 | filter_y, y_step_q4, w, h); |
| 337 | } |
| 338 | |
| 339 | #if CONFIG_VP9_HIGHBITDEPTH |
| 340 | static void highbd_convolve_horiz(const uint8_t *src8, ptrdiff_t src_stride, |
| 341 | uint8_t *dst8, ptrdiff_t dst_stride, |
| 342 | const InterpKernel *x_filters, |
| 343 | int x0_q4, int x_step_q4, |
| 344 | int w, int h, int bd) { |
| 345 | int x, y; |
| 346 | uint16_t *src = CONVERT_TO_SHORTPTR(src8); |
| 347 | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); |
| 348 | src -= SUBPEL_TAPS / 2 - 1; |
| 349 | for (y = 0; y < h; ++y) { |
| 350 | int x_q4 = x0_q4; |
| 351 | for (x = 0; x < w; ++x) { |
| 352 | const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; |
| 353 | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; |
| 354 | int k, sum = 0; |
| 355 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 356 | sum += src_x[k] * x_filter[k]; |
| 357 | dst[x] = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); |
| 358 | x_q4 += x_step_q4; |
| 359 | } |
| 360 | src += src_stride; |
| 361 | dst += dst_stride; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | static void highbd_convolve_avg_horiz(const uint8_t *src8, ptrdiff_t src_stride, |
| 366 | uint8_t *dst8, ptrdiff_t dst_stride, |
| 367 | const InterpKernel *x_filters, |
| 368 | int x0_q4, int x_step_q4, |
| 369 | int w, int h, int bd) { |
| 370 | int x, y; |
| 371 | uint16_t *src = CONVERT_TO_SHORTPTR(src8); |
| 372 | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); |
| 373 | src -= SUBPEL_TAPS / 2 - 1; |
| 374 | for (y = 0; y < h; ++y) { |
| 375 | int x_q4 = x0_q4; |
| 376 | for (x = 0; x < w; ++x) { |
| 377 | const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; |
| 378 | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; |
| 379 | int k, sum = 0; |
| 380 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 381 | sum += src_x[k] * x_filter[k]; |
| 382 | dst[x] = ROUND_POWER_OF_TWO(dst[x] + |
| 383 | clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd), 1); |
| 384 | x_q4 += x_step_q4; |
| 385 | } |
| 386 | src += src_stride; |
| 387 | dst += dst_stride; |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | static void highbd_convolve_vert(const uint8_t *src8, ptrdiff_t src_stride, |
| 392 | uint8_t *dst8, ptrdiff_t dst_stride, |
| 393 | const InterpKernel *y_filters, |
| 394 | int y0_q4, int y_step_q4, int w, int h, |
| 395 | int bd) { |
| 396 | int x, y; |
| 397 | uint16_t *src = CONVERT_TO_SHORTPTR(src8); |
| 398 | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); |
| 399 | src -= src_stride * (SUBPEL_TAPS / 2 - 1); |
| 400 | for (x = 0; x < w; ++x) { |
| 401 | int y_q4 = y0_q4; |
| 402 | for (y = 0; y < h; ++y) { |
| 403 | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; |
| 404 | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; |
| 405 | int k, sum = 0; |
| 406 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 407 | sum += src_y[k * src_stride] * y_filter[k]; |
| 408 | dst[y * dst_stride] = clip_pixel_highbd( |
| 409 | ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); |
| 410 | y_q4 += y_step_q4; |
| 411 | } |
| 412 | ++src; |
| 413 | ++dst; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | static void highbd_convolve_avg_vert(const uint8_t *src8, ptrdiff_t src_stride, |
| 418 | uint8_t *dst8, ptrdiff_t dst_stride, |
| 419 | const InterpKernel *y_filters, |
| 420 | int y0_q4, int y_step_q4, int w, int h, |
| 421 | int bd) { |
| 422 | int x, y; |
| 423 | uint16_t *src = CONVERT_TO_SHORTPTR(src8); |
| 424 | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); |
| 425 | src -= src_stride * (SUBPEL_TAPS / 2 - 1); |
| 426 | for (x = 0; x < w; ++x) { |
| 427 | int y_q4 = y0_q4; |
| 428 | for (y = 0; y < h; ++y) { |
| 429 | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; |
| 430 | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; |
| 431 | int k, sum = 0; |
| 432 | for (k = 0; k < SUBPEL_TAPS; ++k) |
| 433 | sum += src_y[k * src_stride] * y_filter[k]; |
| 434 | dst[y * dst_stride] = ROUND_POWER_OF_TWO(dst[y * dst_stride] + |
| 435 | clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd), 1); |
| 436 | y_q4 += y_step_q4; |
| 437 | } |
| 438 | ++src; |
| 439 | ++dst; |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | static void highbd_convolve(const uint8_t *src, ptrdiff_t src_stride, |
| 444 | uint8_t *dst, ptrdiff_t dst_stride, |
| 445 | const InterpKernel *const x_filters, |
| 446 | int x0_q4, int x_step_q4, |
| 447 | const InterpKernel *const y_filters, |
| 448 | int y0_q4, int y_step_q4, |
| 449 | int w, int h, int bd) { |
| 450 | // Note: Fixed size intermediate buffer, temp, places limits on parameters. |
| 451 | // 2d filtering proceeds in 2 steps: |
| 452 | // (1) Interpolate horizontally into an intermediate buffer, temp. |
| 453 | // (2) Interpolate temp vertically to derive the sub-pixel result. |
| 454 | // Deriving the maximum number of rows in the temp buffer (135): |
| 455 | // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). |
| 456 | // --Largest block size is 64x64 pixels. |
| 457 | // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the |
| 458 | // original frame (in 1/16th pixel units). |
| 459 | // --Must round-up because block may be located at sub-pixel position. |
| 460 | // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. |
| 461 | // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. |
| 462 | uint16_t temp[64 * 135]; |
| 463 | int intermediate_height = |
| 464 | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; |
| 465 | |
| 466 | assert(w <= 64); |
| 467 | assert(h <= 64); |
| 468 | assert(y_step_q4 <= 32); |
| 469 | assert(x_step_q4 <= 32); |
| 470 | |
| 471 | highbd_convolve_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), |
| 472 | src_stride, CONVERT_TO_BYTEPTR(temp), 64, |
| 473 | x_filters, x0_q4, x_step_q4, w, |
| 474 | intermediate_height, bd); |
| 475 | highbd_convolve_vert(CONVERT_TO_BYTEPTR(temp) + 64 * (SUBPEL_TAPS / 2 - 1), |
| 476 | 64, dst, dst_stride, y_filters, y0_q4, y_step_q4, |
| 477 | w, h, bd); |
| 478 | } |
| 479 | |
| 480 | |
| 481 | void vpx_highbd_convolve8_horiz_c(const uint8_t *src, ptrdiff_t src_stride, |
| 482 | uint8_t *dst, ptrdiff_t dst_stride, |
| 483 | const int16_t *filter_x, int x_step_q4, |
| 484 | const int16_t *filter_y, int y_step_q4, |
| 485 | int w, int h, int bd) { |
| 486 | const InterpKernel *const filters_x = get_filter_base(filter_x); |
| 487 | const int x0_q4 = get_filter_offset(filter_x, filters_x); |
| 488 | (void)filter_y; |
| 489 | (void)y_step_q4; |
| 490 | |
| 491 | highbd_convolve_horiz(src, src_stride, dst, dst_stride, filters_x, |
| 492 | x0_q4, x_step_q4, w, h, bd); |
| 493 | } |
| 494 | |
| 495 | void vpx_highbd_convolve8_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, |
| 496 | uint8_t *dst, ptrdiff_t dst_stride, |
| 497 | const int16_t *filter_x, int x_step_q4, |
| 498 | const int16_t *filter_y, int y_step_q4, |
| 499 | int w, int h, int bd) { |
| 500 | const InterpKernel *const filters_x = get_filter_base(filter_x); |
| 501 | const int x0_q4 = get_filter_offset(filter_x, filters_x); |
| 502 | (void)filter_y; |
| 503 | (void)y_step_q4; |
| 504 | |
| 505 | highbd_convolve_avg_horiz(src, src_stride, dst, dst_stride, filters_x, |
| 506 | x0_q4, x_step_q4, w, h, bd); |
| 507 | } |
| 508 | |
| 509 | void vpx_highbd_convolve8_vert_c(const uint8_t *src, ptrdiff_t src_stride, |
| 510 | uint8_t *dst, ptrdiff_t dst_stride, |
| 511 | const int16_t *filter_x, int x_step_q4, |
| 512 | const int16_t *filter_y, int y_step_q4, |
| 513 | int w, int h, int bd) { |
| 514 | const InterpKernel *const filters_y = get_filter_base(filter_y); |
| 515 | const int y0_q4 = get_filter_offset(filter_y, filters_y); |
| 516 | (void)filter_x; |
| 517 | (void)x_step_q4; |
| 518 | |
| 519 | highbd_convolve_vert(src, src_stride, dst, dst_stride, filters_y, |
| 520 | y0_q4, y_step_q4, w, h, bd); |
| 521 | } |
| 522 | |
| 523 | void vpx_highbd_convolve8_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, |
| 524 | uint8_t *dst, ptrdiff_t dst_stride, |
| 525 | const int16_t *filter_x, int x_step_q4, |
| 526 | const int16_t *filter_y, int y_step_q4, |
| 527 | int w, int h, int bd) { |
| 528 | const InterpKernel *const filters_y = get_filter_base(filter_y); |
| 529 | const int y0_q4 = get_filter_offset(filter_y, filters_y); |
| 530 | (void)filter_x; |
| 531 | (void)x_step_q4; |
| 532 | |
| 533 | highbd_convolve_avg_vert(src, src_stride, dst, dst_stride, filters_y, |
| 534 | y0_q4, y_step_q4, w, h, bd); |
| 535 | } |
| 536 | |
| 537 | void vpx_highbd_convolve8_c(const uint8_t *src, ptrdiff_t src_stride, |
| 538 | uint8_t *dst, ptrdiff_t dst_stride, |
| 539 | const int16_t *filter_x, int x_step_q4, |
| 540 | const int16_t *filter_y, int y_step_q4, |
| 541 | int w, int h, int bd) { |
| 542 | const InterpKernel *const filters_x = get_filter_base(filter_x); |
| 543 | const int x0_q4 = get_filter_offset(filter_x, filters_x); |
| 544 | |
| 545 | const InterpKernel *const filters_y = get_filter_base(filter_y); |
| 546 | const int y0_q4 = get_filter_offset(filter_y, filters_y); |
| 547 | |
| 548 | highbd_convolve(src, src_stride, dst, dst_stride, |
| 549 | filters_x, x0_q4, x_step_q4, |
| 550 | filters_y, y0_q4, y_step_q4, w, h, bd); |
| 551 | } |
| 552 | |
| 553 | void vpx_highbd_convolve8_avg_c(const uint8_t *src, ptrdiff_t src_stride, |
| 554 | uint8_t *dst, ptrdiff_t dst_stride, |
| 555 | const int16_t *filter_x, int x_step_q4, |
| 556 | const int16_t *filter_y, int y_step_q4, |
| 557 | int w, int h, int bd) { |
| 558 | // Fixed size intermediate buffer places limits on parameters. |
| 559 | DECLARE_ALIGNED(16, uint16_t, temp[64 * 64]); |
| 560 | assert(w <= 64); |
| 561 | assert(h <= 64); |
| 562 | |
| 563 | vpx_highbd_convolve8_c(src, src_stride, CONVERT_TO_BYTEPTR(temp), 64, |
| 564 | filter_x, x_step_q4, filter_y, y_step_q4, w, h, bd); |
| 565 | vpx_highbd_convolve_avg_c(CONVERT_TO_BYTEPTR(temp), 64, dst, dst_stride, |
| 566 | NULL, 0, NULL, 0, w, h, bd); |
| 567 | } |
| 568 | |
| 569 | void vpx_highbd_convolve_copy_c(const uint8_t *src8, ptrdiff_t src_stride, |
| 570 | uint8_t *dst8, ptrdiff_t dst_stride, |
| 571 | const int16_t *filter_x, int filter_x_stride, |
| 572 | const int16_t *filter_y, int filter_y_stride, |
| 573 | int w, int h, int bd) { |
| 574 | int r; |
| 575 | uint16_t *src = CONVERT_TO_SHORTPTR(src8); |
| 576 | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); |
| 577 | (void)filter_x; |
| 578 | (void)filter_y; |
| 579 | (void)filter_x_stride; |
| 580 | (void)filter_y_stride; |
| 581 | (void)bd; |
| 582 | |
| 583 | for (r = h; r > 0; --r) { |
| 584 | memcpy(dst, src, w * sizeof(uint16_t)); |
| 585 | src += src_stride; |
| 586 | dst += dst_stride; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | void vpx_highbd_convolve_avg_c(const uint8_t *src8, ptrdiff_t src_stride, |
| 591 | uint8_t *dst8, ptrdiff_t dst_stride, |
| 592 | const int16_t *filter_x, int filter_x_stride, |
| 593 | const int16_t *filter_y, int filter_y_stride, |
| 594 | int w, int h, int bd) { |
| 595 | int x, y; |
| 596 | uint16_t *src = CONVERT_TO_SHORTPTR(src8); |
| 597 | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); |
| 598 | (void)filter_x; |
| 599 | (void)filter_y; |
| 600 | (void)filter_x_stride; |
| 601 | (void)filter_y_stride; |
| 602 | (void)bd; |
| 603 | |
| 604 | for (y = 0; y < h; ++y) { |
| 605 | for (x = 0; x < w; ++x) { |
| 606 | dst[x] = ROUND_POWER_OF_TWO(dst[x] + src[x], 1); |
| 607 | } |
| 608 | src += src_stride; |
| 609 | dst += dst_stride; |
| 610 | } |
| 611 | } |
| 612 | #endif |